I'm trying to create a dynamic site based on a static theme. I wonder to know why when I want to put my main menu in the region--page-top.tpl.php it does't work. this code
<?php print theme('links__system_main_menu', array('links' => $main_menu, 'attributes' => array( 'class' => array('links','inline'))));?>
works correctly inside the page.tpl.php but it seems that php code doesn't recognize in the region section. The HTML codes work fine, though.